Buses are often the bane of my existence. I would prefer to travel on a vinegar-soaked
Penny Farthing than a London bus.

Children behave badly on buses. There is a direct
correlation between children's behaviour and their subconscious sense of danger.
They sense little danger on buses - they are used to travelling by cars and
if there is a problem they can just press the emergency exit button and skip
out of the bus - and so they behave raucously and make a nuisance of themselves.
On trains kids behave a little better, they know that they are trapped between
stations and even though they can see the outside world, they can't escape
too easily. They sense some danger. On tube trains kids behave very well indeed,
they sense that they are trapped underground and are at the whim of the driver
until they reach the next station.

I don't know what the moral lesson of all this
is. I suspect that children need some sense of danger or punishment in order
to behave. Carrots are all very well, but sometimes you need a stick.